X-ray Crystallographic Structure of a Teixobactin Derivative Reveals Amyloid-like Assembly
This paper describes the X-ray crystallographic structure of a derivative of the antibiotic teixobactin and shows that its supramolecular assembly through the formation of antiparallel β-sheets creates binding sites for oxyanions. An active derivative of
Yang, Hyunjun,Wierzbicki, Micha?,Du Bois, Derek R.,Nowick, James S.
Synthesis of optically active arylene bis-alanine derivatives carrying orthogonal protecting groups
Derivatives of para- and meta-phenylene bis-alanine and related biphenyl systems, carrying four orthogonal protecting groups, were synthesised via combinations of Heck couplings and asymmetric hydrogenations. The intermediate unsaturated arylalanine derivatives were hydrogenated using [Rh(COD)((R,R)-DIPAMP)]+BF4- or [Rh(COD)(Me-DuPHOS)]+X- as catalysts to produce the optically active, protected amino acid derivatives in ≤98% e.e. as analysed by chiral phase HPLC.